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Differences (Appearance) of a Tubro and N/A Engine?

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Old 07-28-02, 03:15 PM
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Differences (Appearance) of a Tubro and N/A Engine?

Anyone know a good way to distinguish a turbo engine and a n/a engine just by looking at it bare block? I ask because I just recieved my rebuilt, and all the paperwork says it is a turbo engine, but there at subtle differences from my old one and it makes me wonder if they sent me the wrong one.
Old 07-28-02, 04:35 PM
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What kind of subtle differences?
Old 07-28-02, 04:39 PM
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Well, the biggest one is the oil filler tube thingy sticks up way further than on my old engine, and doesn't have the gasket / bolt holes so that I can attach the elbow to it. So when I tried to put that intercooler mounting bracket on it to hoist the engine with, it wouldn't fit cause the oil thingy was in the way.

Now when I look at pics of N/A and TII engine bays, I notice that on N/A's it sticks straight up cause the I/C isn't there to block it, whereas the TII's it is shorter like on my old engine.

Heres a pic of it in the crate. Notice the oil filler:

Old 07-28-02, 04:42 PM
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Your old engine was an s4 I am assuming right? Maybe thats an s5? I dunno my oil filler neck is different also, but I have an s4.
Old 07-28-02, 04:44 PM
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Nope, old engine was an S5 as well. Heres a pic of the old one:

Old 07-28-02, 05:04 PM
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Aren't Turbo housings all 4 port?
Recent NA'a are 6 port.

Easy to see on a bare block

There are also differences in the exhaust ports.

http://www.mazdatrix.com/faq/6pexh.htm

Last edited by RotoHusker; 07-28-02 at 05:22 PM.
Old 07-28-02, 09:15 PM
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bump

Can someone post a picture of what a six port engine would look like, cause I don't have one... Thanks
Old 07-28-02, 09:36 PM
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The oil filler neck (Turbo and NA) simply presses into the hole in the center plate. It could simply be an NA filler neck in a Turbo center plate. Or they could have completely stuffed up and rebuilt the engine with an NA center plate.
BTW, a 6-port NA engine has six intake ports, the 4-port Turbo has (gasp!) four.
Old 07-28-02, 09:40 PM
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Originally posted by AreExSeven
bump

Can someone post a picture of what a six port engine would look like, cause I don't have one... Thanks
http://www.mazdatrix.com/faq/port6p.htm
Old 07-28-02, 09:50 PM
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They put an N/A filler neck in your TII engine, if the ports are only 4 ports.

The filler necks pull in and out, with some twisting. Just get another filler neck from a wrecker.
Old 07-29-02, 12:11 AM
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Well here are some pics (best I could get from in the box). Looks N/A to me, can you guys confirm it?



Old 07-29-02, 01:18 AM
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N/A
The top hole is where the 6 port sleeve goes
Old 07-29-02, 01:26 AM
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Damn, that sux if they sent you the wrong one .. make sure they pay shipping.
Old 07-29-02, 01:28 AM
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Originally posted by Rpeck
Damn, that sux if they sent you the wrong one .. make sure they pay shipping.
So it look wrong to you too?

I'll make sure they pay for it. Hell, ill try and get a free port job out of it...
Old 07-29-02, 01:31 AM
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Haha thats what I was thinking .. a free port job Lemme go in the garage real quick and look at my TII block .. compare them to your photo's BRB
Old 07-29-02, 01:36 AM
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Yup, Its the wrong one Thats a N/A for sure.. my block is a S4 but that should not account for any intake port changes.
Old 07-29-02, 05:47 AM
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That's definately a 6port block.
Old 07-29-02, 05:55 AM
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maybe they were trying to send u a subliminal message about whos the supperior rotary machine *cough* 13b n/a *cough* j/k
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